e-Quals

Outcome 5: Use graphics software to create and manipulate images on a web page

Practical activities The candidate will be able to:

1. resize images within web sites:

   a. for use as background images on pages
   b. for use as a icons or thumbnails
   c. to specific dimensions

2. apply transparency to images
3. use file compression to achieve optimal quality of images within constraints (file size, download times)
4. apply 'web safe' palettes of colours to images

Underpinning knowledge The candidate will be able to:

1. explain the factors that affect the file size of an image:

   a. number of colours
   b. file compression
   c. physical pixel dimensions
   d. file type

2. describe the advantage of 'transparency' when applied to an image
3. explain the purpose of using a 'web safe' palette of colours

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© 2002 Ashley Preston 

Christopher Ward London Limited